[LifetimeSafety] Add support for GSL Pointer types (#154009)

This extends the lifetime safety analysis to support C++ types annotated
with `gsl::Pointer`, which represent non-owning "view" types like
`std::string_view`. These types have the same lifetime safety concerns
as raw pointers and references.

- Added support for detecting and analyzing `gsl::Pointer` annotated
types in lifetime safety analysis
- Implemented handling for various expressions involving `gsl::Pointer`
types:
  - Constructor expressions
  - Member call expressions (especially conversion operators)
  - Functional cast expressions
  - Initialization list expressions
  - Materialized temporary expressions
- Updated the pointer type detection to recognize `gsl::Pointer` types
- Added handling for function calls that create borrows through
reference parameters

Fixes: https://github.com/llvm/llvm-project/issues/152513
3 files changed
tree: f788e0dedff35d501595b6b7ebfaa5c39988b8b2
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. flang-rt/
  11. libc/
  12. libclc/
  13. libcxx/
  14. libcxxabi/
  15. libsycl/
  16. libunwind/
  17. lld/
  18. lldb/
  19. llvm/
  20. llvm-libgcc/
  21. mlir/
  22. offload/
  23. openmp/
  24. orc-rt/
  25. polly/
  26. runtimes/
  27. third-party/
  28. utils/
  29. .clang-format
  30. .clang-format-ignore
  31. .clang-tidy
  32. .git-blame-ignore-revs
  33. .gitattributes
  34. .gitignore
  35. .mailmap
  36. CODE_OF_CONDUCT.md
  37. CONTRIBUTING.md
  38. LICENSE.TXT
  39. pyproject.toml
  40. README.md
  41. SECURITY.md
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